Servants of the almighty,
Against the whole world free.
As our fathers trusted,
Teach us also to trust, o Lord:
With our land and with our nation
It will be well, God reigns.

1: here, does the verb "Trust" mean "To have faith in God"?
2: "With our land, and with our nation, it well be well, God reings". Does that mean "Our land and our nation will be well under the Lord's kingdom"?
3: "Against the whole world free". What is that supposed to mean? Does that mean "We are the only free people in the world who go against the rest of the humanity, who is not free"?

What you have is a direct Google translation to English so it has come out wrong, below is the correct wording. In English the placement of a word or spelling can change the meaning of a sentence.
It was translated into English in 1952, while God Save the Queen did not cease to have official status until 1957. The poem originally had only three verses, but the government asked the author to add a fourth verse with a religious theme,hope this helps

What you have is a direct Google translation to English so it has come out wrong, below is the correct wording. In English the placement of a word or spelling can change the meaning of a sentence.
It was translated into English in 1952, while God Save the Queen did not cease to have official status until 1957. The poem originally had only three verses, but the government asked the author to add a fourth verse with a religious theme,hope this helps

Bondsmen only to the highest
And before the whole world free.
As our fathers trusted humbly,
Teach us, Lord to trust Thee still;
Guard our land and guide our people
In Thy way to do Thy will.

Thank you very much. The translation is going on.

I don't speak Afrikaans, but I have a very basic level of German, which is pretty similar to Afrikaans, so it will be easier for me to do the job.

Indeed, it is not going to be an exact translatio. For example, "Stem" means "Call", but I translate it as "spirit", because it makes much more sense that way, at least in Spanish, while the sense of the song will keep being the same.